People ask whether the mass media has a Leftist bias.
Unask the question: it implies a false frame.
The mass media is Leftist bias, it is the core of Leftism, has been since the mid-1960s at least and ever-more-so.
The standard model of media bias is a government which tells the media what to say and vets what it says in all minute particulars: something like Stalin and Pravda.
That obviously isn't what happens in the modern world - it would of course be impossible, such is the utterly vast volume of material being generated; and stupid people suppose this means that the media and government are independent the one of the other.
The mass media is not biased to Leftism, it is Leftism; so of course, Leftism must come from within the media: the bias is generated by the mass media.
What we have is (almost) the opposite of Stalin and Pravda.
Indeed, the power of government, and government officials, is now essentially the power of informers: they can 'shop' people to the mass media: their role is to enforce punishments on people chosen by the mass media.
But government cannot go against the mass media, because anyone who does will be picked-off for exemplary punishment.
If no specific person is responsible, then somebody will nonetheless be picked by the media for public punishment, to serve as an example (this is happening at present, all the time, all through the world, in large and in small).
Nobody is immune - everybody in public life who wants to stay in public life is afraid of the mass media.
(Well, everybody within the system of worldly modernity, anyway; but this now has an extensive reach, as events in the Middle East make clear. The state of deferential terror towards the mass media notably includes the heads of the major Western churches, who very obviously fear to depart from the media Leftist agenda, and live in continual trepidation about having a target painted on them by the mass media. This has eliminated traditional Christianity - that is, real Christianity - from the leadership of all the major denominations.)
The mass media choose and label the targets for exemplary punishment, and various groups (police, officials, astroturf mobs, real mobs... it does not much matter which) will enforce punishments of one sort or another - from harassment via investigations up to vandalism, violence, prison and murder; and the media gives the whole process a positive interpretation.
That which happens outside this and/ or against the agenda of the mass media loop is ignored, mentioned then flushed down the memory hole, reframed, vilified, distorted, lied about, subjected to invented slurs...
Oh! the possibilities are endless!
Leftism is the mass media, and the mass media is Leftism, inseparable, the same thing: this of course means that Leftism (in its modern form) depends utterly on the continuation of the mass media (depends on itself!), stands or falls with the mass media.
The mass media is the enemy of reaction, and cannot be subverted or exploited for reactionary purposes.
Anything which significantly damages the reach or grip of the mass media net damages Leftism - even if restrictions go against freedom, democracy, balance; even if directed against reaction; all things which tend to limit the mass media will ultimately lead to reaction...
(...Although, on present trends, not necessarily, nor even probably, tending to Christian reaction. Leftism is anti-Christian; but since Leftism is self-destroying it will necessarily lead to reaction: the priority for the Left is therefore that what follows its self-destruction will not be Christian. The only thing that could prevent this trend from becoming the outcome would be repentance and massive Christian awakening, renewal, growth...)